Dark Sky Rules: Castaic vs Los Angeles
How do dark sky rules rules compare between Castaic, CA and Los Angeles, CA?
Castaic and Los Angeles have similar restriction levels.
Castaic, CA
Los Angeles County
LA County's Rural Outdoor Lighting District (ROLD) ordinance, effective 2012, requires fully shielded outdoor lighting and prohibits light trespass in designated rural unincorporated areas. The ROLD covers mountain and rural communities. Mercury vapor lights and drop-down lenses are prohibited.
View full Castaic rules →Los Angeles, CA
Los Angeles County
Los Angeles Municipal Code §93.0108 caps new outdoor LED fixtures at 3000K, requires full shielding, and limits trespass to 0.5 foot-candles at residential property lines. The ordinance applies citywide to new installations, replacements, and permitted remodels but exempts pre-existing fixtures and emergency lighting.
View full Los Angeles rules →Key Facts Comparison
| Fact | Castaic | Los Angeles |
|---|---|---|
| ROLD | Effective since 2012 | - |
| Shielding | All outdoor lighting must be fully shielded | - |
| Mercury Vapor | Prohibited | - |
| Applies To | Rural unincorporated areas | - |
| - | - |
Highlighted rows indicate differences between cities.
Castaic FAQ
Does LA County have dark sky rules?
Yes. The Rural Outdoor Lighting District (ROLD) ordinance restricts outdoor lighting in rural unincorporated areas. It requires full shielding, warm color temperatures, and maximum lumen limits to reduce light pollution.
Am I in the ROLD?
The ROLD covers rural unincorporated communities in the Santa Monica Mountains, northern LA County, and other designated areas. Check with the Department of Regional Planning at (213) 974-6411 or review the ROLD boundary maps on planning.lacounty.gov.
What type of outdoor lights are allowed in ROLD areas?
Fully shielded fixtures (no upward light emission) with warm white color temperature (below 3000K recommended). Maximum lumen output varies by fixture type and location. All new fixtures must be ROLD-compliant.
Los Angeles FAQ
Do I need to replace my existing lights?
No. Pre-existing fixtures are grandfathered. Replacements, new permits, and tenant improvements that touch the electrical system must comply with §93.0108.
Are holiday lights exempt?
Yes. Temporary seasonal lighting is exempt November 15 to January 15 if pointed downward.
What color temperature is allowed?
New outdoor LEDs are capped at 3000K. Warm-white 2700K is recommended for hillside and residential areas.
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